That would be the opposite of the opposite, and not only do opposites attract, but double negatives often mean the opposite of what the person is meaning, so, even if you think I meant the opposite, it is likely that you are simply incorrect.
Unless you happen to by speaking in Russian
[1], then a double negative just reinforces the single negative so, I guess a a double double negative is four times as strong as a single negative.
[1] For all the sense you make most of the time, you might as well be speaking in Russian.
До свидания имейте хороший день.